Looking for a way to theme stock android folders...

I've been using Folder Organizer for a long time, but lately I've been getting annoyed with its lag. The built-in android folders are way more responsive (for me anyway) but they absolutely do not match my desktop scheme. So, I'm trying to find out if there's a way to theme the stock folders? Even if it means editing PNGs in the framework (or wherever), I'm comfortable with that- I just can't figure out which ones to edit. Any help would be greatly appreciated.